package cn.edu.scau.cmi.wujiaxian.exercise5;

public class Example5_4 {

	public static void main(String[] args) {
		Circle circle = new Circle();
		double w = 121.709;
		circle.setRadius(w);
		System.out.println("圆的半径：" + circle.getRadius());
		System.out.println("圆的面积：" + circle.getArea());
		System.out.println("更改向方法参数r传递值的w的值为100");
		w = 100;
		System.out.println("w=" + w);
		System.out.println("圆的半径：" + circle.getRadius());

	}

}
